28278915

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{251}}^1$

素因数の和:332

約数の個数: 64

約数和(自身を含む): 55157760

約数和(自身を除く): 26878845

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 37, 87, 105, 111, 145, 185, 203, 251, 259, 435, 555, 609, 753, 777, 1015, 1073, 1255, 1295, 1757, 3045, 3219, 3765, 3885, 5271, 5365, 7279, 7511, 8785, 9287, 16095, 21837, 22533, 26355, 27861, 36395, 37555, 46435, 50953, 65009, 109185, 112665, 139305, 152859, 195027, 254765, 269323, 325045, 764295, 807969, 975135, 1346615, 1885261, 4039845, 5655783, 9426305, 28278915]

約数ペア:

[(1, 28278915), (3, 9426305), (5, 5655783), (7, 4039845), (15, 1885261), (21, 1346615), (29, 975135), (35, 807969), (37, 764295), (87, 325045), (105, 269323), (111, 254765), (145, 195027), (185, 152859), (203, 139305), (251, 112665), (259, 109185), (435, 65009), (555, 50953), (609, 46435), (753, 37555), (777, 36395), (1015, 27861), (1073, 26355), (1255, 22533), (1295, 21837), (1757, 16095), (3045, 9287), (3219, 8785), (3765, 7511), (3885, 7279), (5271, 5365)]